Changes in stream flow and their relationships with climatic variations and anthropogenic activities in the Poyang Lake Basin, China

Gu, C; Mu, X; Zhao, G; Gao, P; Sun, W; Yu, Q

Changes in stream flow and their relationships with climatic variations and anthropogenic activities in the Poyang Lake Basin, China

Gu, C Mu, X Zhao, G Gao, P Sun, W Yu, Q

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Publisher:: MDPI
Publication Type:: Journal Article
Citation:: Water (Switzerland), 2016, 8, (12)
Issue Date:: 2016-01-01

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Field	Value	Language
dc.contributor.author	Gu, C
dc.contributor.author	Mu, X
dc.contributor.author	Zhao, G
dc.contributor.author	Gao, P
dc.contributor.author	Sun, W
dc.contributor.author	Yu, Q https://orcid.org/0000-0001-6950-1821
dc.date.accessioned	2022-01-30T07:55:55Z
dc.date.available	2022-01-30T07:55:55Z
dc.date.issued	2016-01-01
dc.identifier.citation	Water (Switzerland), 2016, 8, (12)
dc.identifier.issn	2073-4441
dc.identifier.issn	2073-4441
dc.identifier.uri	http://hdl.handle.net/10453/153863
dc.description.abstract	The Poyang Lake Basin has been suffering from severe water problems such as floods and droughts. This has led to great adverse impacts on local ecosystems and water resource utilization. It is therefore important to understand stream flow changes and their driving factors. In this paper, the dynamics of stream flow and precipitation in the Poyang Lake Basin between 1961 and 2012 were evaluated with the Mann-Kendall test, Theil-Sen approaches, Pettitt test, and Pearson's correlation. Stream flow was measured at the outlets of five major tributaries of Poyang Lake, while precipitation was recorded by fourteen meteorological stations located within the Poyang Lake Basin. Results showed that annual stream flow of all tributaries and the precipitation over the study area had insignificant (P > 0.1) temporal trends and change points, while significant trends and shifts were found in monthly scale. Stream flow concentration indices (SCI) at Waizhou, Meigang, and Wanjiabu stations showed significant (P < 0.05) decreasing trends with change points emerging in 1984 at Waizhou and 1978 at Wanjiabu, while there was no significant temporal trend and change point detected for the precipitation concentration indices (PCI). Correlation analysis indicated that area-average stream flow was closely related to area-average precipitation, but area-average SCI was insignificantly correlated with area-average PCI after change point (1984). El Niño/Southern Oscillation (ENSO) had greater impacts on stream flow than other climate indices, and La Niña events played a more important role in stream flow changes than EI Niño. Human activities, particularly in terms of reservoir constructions, largely altered the intra-annual distribution of stream flow but its effects on the amount of stream flow were relatively low. Results of this study provided a useful reference to regional water resource management and the prevention of flood and drought disasters.
dc.language	English
dc.publisher	MDPI
dc.relation.ispartof	Water (Switzerland)
dc.relation.isbasedon	10.3390/w8120564
dc.rights	info:eu-repo/semantics/openAccess
dc.title	Changes in stream flow and their relationships with climatic variations and anthropogenic activities in the Poyang Lake Basin, China
dc.type	Journal Article
utslib.citation.volume	8
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Life Sciences
utslib.copyright.status	open_access	*
dc.date.updated	2022-01-30T07:55:43Z
pubs.issue	12
pubs.publication-status	Published
pubs.volume	8
utslib.citation.issue	12

Abstract:

The Poyang Lake Basin has been suffering from severe water problems such as floods and droughts. This has led to great adverse impacts on local ecosystems and water resource utilization. It is therefore important to understand stream flow changes and their driving factors. In this paper, the dynamics of stream flow and precipitation in the Poyang Lake Basin between 1961 and 2012 were evaluated with the Mann-Kendall test, Theil-Sen approaches, Pettitt test, and Pearson's correlation. Stream flow was measured at the outlets of five major tributaries of Poyang Lake, while precipitation was recorded by fourteen meteorological stations located within the Poyang Lake Basin. Results showed that annual stream flow of all tributaries and the precipitation over the study area had insignificant (P > 0.1) temporal trends and change points, while significant trends and shifts were found in monthly scale. Stream flow concentration indices (SCI) at Waizhou, Meigang, and Wanjiabu stations showed significant (P < 0.05) decreasing trends with change points emerging in 1984 at Waizhou and 1978 at Wanjiabu, while there was no significant temporal trend and change point detected for the precipitation concentration indices (PCI). Correlation analysis indicated that area-average stream flow was closely related to area-average precipitation, but area-average SCI was insignificantly correlated with area-average PCI after change point (1984). El Niño/Southern Oscillation (ENSO) had greater impacts on stream flow than other climate indices, and La Niña events played a more important role in stream flow changes than EI Niño. Human activities, particularly in terms of reservoir constructions, largely altered the intra-annual distribution of stream flow but its effects on the amount of stream flow were relatively low. Results of this study provided a useful reference to regional water resource management and the prevention of flood and drought disasters.

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http://hdl.handle.net/10453/153863